Navigation System - Voice Recognition Inoperative

Navigation System - Voice Recognition Inoperative

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Initial Inspection and Diagnostic Overview) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Initial Inspection and Diagnostic Overview)provides an overview of each diagnostic category.



Reference Information
Schematic Reference

OnStar Schematics (OnStar Schematics)
Connector End View Reference

Component Connector End Views (Connector Views)
Electrical Information Reference

* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)



Circuit/System Testing

1. Verify the OnStar(R) voice recognition is operating normally.

• If the OnStar(R) voice recognition is inoperative, refer to OnStar Microphone Inoperative - Caller Cannot Be Heard (OnStar Microphone Inoperative - Caller Cannot Be Heard) .

2. Ignition OFF, disconnect the radio harness connector X1 and VCIM harness connector X3.
3. Test for less than 1 volt on the voice recognition audio signal circuit radio harness connector terminal 4 and ground.

• If greater than specified value, repair short to voltage.

4. Test for greater than 1 ohm between the voice recognition audio signal circuit radio harness connector terminal 4 and ground.

• If less than specified value, repair short to ground.

5. Test for less than 1 ohm between the voice recognition audio signal circuit radio harness connector terminal 4 and the voice recognition audio signal circuit VCIM harness connector terminal 2.
6. If greater than specified value, repair open circuit.
7. Test for less than 1 volt on the voice recognition audio low reference circuit radio harness connector terminal 5 and ground.

• If greater than specified value, repair short to voltage.

8. Test for greater than 1 ohm between the voice recognition audio low reference circuit radio harness connector terminal 5 and ground.

• If less than specified value, repair short to ground.

9. Test for less than 1 ohm between the voice recognition audio low reference circuit radio harness connector terminal 5 and the voice recognition audio low reference signal circuit VCIM harness connector terminal 4.

• If greater than specified value, repair open circuit.

10. If all circuits test normal, replace the radio.



Repair Instructions

Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.


Control Module References (Programming and Relearning)for radio replacement, setup, and programming